SOURCE ROCK AND OIL GEOCHEMISTRY AND CORRELATION IN SHUANGCHENG-TAIPINGCHUAN AREA, THE SONGLIAO BASIN

Shuangcheng-Taipingchuan is an important petroleum exploration area in the north of Songliao Basin.By synthetically analyzing geochemical characteristics of petroleum and mudstone,it indicates that petroleum belongs to the same population in Fuyu and Yangdachengzi oil layer.The studied petroleum mainly comes from Qing 1 member and partly from Qing 2+3 member mudstone of the Sanzhao Sag and the Chaoyanggou Bench,but not from Nen 1 member mudstone.Moreover,oil of the Sanzhao Sag and the Chaoyanggou Bench mainly comes from their Qing 1 member hydrocarbon source kitchen.Petroleum of the Changchunling Anticline Belt and the Wangfu Sag mainly comes from Qing 1 member hydrocarbon source kitchen in the Wangfu Sag.Qing 1 member hydrocarbon source kitchen of the Sanzhao Sag and the Chaoyanggou Bench also has partial contribution to petroleum in the Changchunling Anticline Belt.